Yes, this is an official HTC leak, and you will have no problem loading the OTA. Make sure you follow my steps one by one, do not forget you will lose all your SMS and call history, and also do a backup of all your contact is Verizon backup assistant, so I suggest you go to the Market and download a SMS backup file manager like SMS Backup+, if the SMS's are important to you, you will also have to reinstal all your apps, once you setup your Gmail account with the Play store your apps will all be there for you to reload "that is the beauty of ICS,
Thanks for the valuable information. How about the photos and videos, will they be lost during the upgrade?